Disk harrow.



No, 645,8l8. Patented Mar. 20, I900. A. LINDGREN.

DISK HARROW.

(Application filed Dec. 14, 1899.

2 Sheets-$haet I.

(No Model.)

hoard/02 0. WASHINGTON. n. q.

No. 645,818] I Patentedvlfiar. 20, I900.

A. LINDGBEN. v DISK HARROW.

(Application filed Dec. 14, 1899.)

2 Sheets-Sheet 2.

(No Model.)

NITED STATES-i PATENT FIoE.

nUcUs'r LINDGREN, or MOLINE, ILLINOIS, ASSIGNOR TO THE MOLINE PLowCOMPANY, or ILLINOIS.

olsK HARROW.

srncrrrcarron forming s of Letters Patent N6. 645,818, dated March 20,1900. Application filed December 14) 1899. .Serial No. 740,248. (Nomodel.)

To all whom it may concern.-

Be it known that I, Aueosr LINDGREN, of

. Moline, county of Rock Island, and State of Illinois, have invented anew and useful 1mprovement in Disk Harrows, of which the following is aspecification.

This invention has reference to disk harrows, and relates moreparticularly to the scraping devices for freeing the disks of anyadhering matters.

The invention consists of an improved -means of mounting and sustainingthe scrapers, so that by the operation of a foot or other lever they maybe swung in a gang from the centers of the disks to the peripheries tothe end that every portion of the disk in its rotation may be cleaned.

In the accompanying drawings, Figure 1 is a rear elevation of a diskharrow having my improved invention applied thereto. Fig. 2 isatransverse sectionalelevatioh of the same. Fig. 3 is a transversesectional elevation through the rocking bar carrying the scrapers,showing in elevation the bearing for the bar.

Fig. 4 is a sectional elevation, on an enlarged scale, of one of thescraper-blades and its socket or holder. Fig. 5 is a top perspectiveview of thesame, showing how the blade may be rocked or tipped in itsholder on a longitudinal axis passing throughthe blade. Fig. 6 is a topplan view of the parts shown, in the preceding figure with the bladetipped in the opposite direction. 1

Referring to the drawings, 1 represents a frame to which are connectedtwohorizontal bars 2, preferably of angle-iron, arranged end to end andsustaining beneath them two gangs of rotary cutting-disks 3, which inthe present instance are dished or curved inward and mounted to revolveon axes extending parallel with the bars 2, as usual in machines of thischaracter. Nearits opposite ends each bar has bolted to its rear facesbrackets 4:, each having an opening 5 therein to receive a rocking bar6, to which are connected at intervals, as will be more fully describedhereinafter, a series of scraper-blades 7, one for each disk, whichblades have their active lower ends in such position that when the baris rocked they will be moved back and forth permitted to rock only to alimited extent, the 5 5 forward motion of the bar being limited by theforward upper wall 7 of the opening and the lower rear wall 8, and themotion of the bar in the opposite direction being limited by the forwardlower wall 9 and the upper rear wall 10 of the opening. The size, form,and arrangement of the several parts is such that when the rocking baris in its rear position, as shown in Fig. 3, the active ends of theblades will be adjacent to the center of the disks, and when the bar isin its forward position, as shown by dotted lines in said figure,

the ends of the blades will be near or at the peripheries of the disks.It is seen, therefore, that by the peculiar form of the opening in thebracket the rocking bar is afforded a firm bearing and at the same timelimited in its rocking motion, so that there is no danger of the activeends of the' blades moving inward beyond the center of the disks oroutward beyond their peripheries.

The scraper-blades are preferably of fiat steel and connected with therocking bar in such manner that they may move independently to a limitedextent to and from the disk in the line of the axes of the latter andmay also rock or trip independently around their longitudinal axes. Thefirst motion permits the blade to lie at all times in contact with theface of the disk, whether ad- 'justed at its center or at its periphery,while the second motion permits the end of the blade to lie flatlyagainst the disk at what ever point between the center and its periph- Icry. To effect this result, each blade has its upper end inserted in anopening or socket in holders 11 in the form of castings bolted atintervals on the rear face of the rocking bars, as clearly shown in Fig.'1. The opening in each holder is widest at-itsbottom, and 5 at itsupper end is considerably wider than the thickness of the blade, so thatthe latter may move in the opening to a limited extent both in thedirection of the axes of the disks and also around the longitudinal axisof the mo blade, as indicated in Fig. 5. The two walls of the opening inthe holder diverge, and both incline downward and outward toward itsdisk in order that the active ends of the blades may occupy the properrelative positions with respect to the disks and be properly limited inthe independent motions described. The inner wall of each opening isformed with an integral lateral tub ular socket 12, communicating withthe opening, and in the sockets are seated spiral springs 13, which bearagainst the side of the blades and which tend to hold the sameyieldingly against the face of the disks. The blades are suspendedloosely in their holders by means of fasten ing-pins 14, extendingthrough the walls of the openings at their upper ends and through anenlarged hole in the upper ends of the blades, this constructionpermitting the lat ter to have a free movement subject to the action ofthe springs in the two directions described.

From the foregoing description it is seen that the rocking bar serves asa sole means for supporting the blades and that the latter are movableby this bar in a gang across the 1 face of the disks between theircenters and their peripheries. At the same time each blade is movableindependently in the direction of the axes of the disks, so that theywill at all times accommodate themselves to the changing angles of theplane of the disks. It is further seen that by reason of the rockingmotion of the individual blades their ends at all times will lie flatlyagainst the disks, notwithstanding the change in the angles of the planedue to the inward curvature of the same. These independent motions ofthe blades are further advantageous in that there will be no obstructionto their general movement in the event of one or more of the bladesencountering an obstruction on its disk difficult of dislodgment. Insuch a case the blade will yield and pass over the obstruction,permitting the rocking bar to be moved to effect the cleansing of theremaining disks.

The rocking bar may be operated by any suitable means, such as a hand orfoot lever or the like. In the present instance I have shown the rockingbar as having applied to it near its outer end adjacent to the bearingbracket 4. a foot-lever 15,'which bears against the bracket and servesto prevent the rocking bar from moving endwise beyond its properposition.

Having thus described my invention, what I claim is- 1. In a disk harrowthe combination with the frame of a series of rotary disks mountedthereon, a series of rocking blade-holders sustained by the frame, aseries of scraper-blades each mounted in a holder and movableindepende'ntlythereof in the direction of the axes of the disks, and aseries of springs, one mounted in each holder and bearing on the bladetherein and tending to urge the same against its disk; whereby theblades are adapted to be moved in gang across the face of the disks fromtheir centers to the peripheries and are each movable independently inits holderin the direction of the axes of the disks, subject to theaction of the springs.

2. In a disk harrow the combination with a series of cutting-disks, of aseries of swinging scraper-blades, means for swinging the blades in agang across the faces of the disks between the centers and peripheries,said blades being eachmovable independently in the direction of the axesof the disks and also movable independently around the longitudinal axesof the blades, and springs acting on the blades and tending to hold thesame in contact with the disks.

3. In a disk harrow the combination with a series of cutting-disks of arocking bar above the same provided with a series of sockets,scraper-blades each with its upper end extending loosely in a socket,and fastening devices serving to suspend the blades loosely in thesockets.

4.. In a disk harrowthe combination with a series of rotary disks of arocking bar thereover, means for rocking the bar, a series of holders onthe bar having openings widest at the bottom, a series of scraper-bladeshaving.

each its upper end extending and loosely secured in the socket, andsprings mounted in the holders and bearing on the respective blades.

5. In a disk harrow the combination with a series of disks of a rockingbar thereover, a series of holders applied to the bar, each with anopening to receive a blade and formed each with a socket, a series ofblades with their upper ends extending loosely and secured in theopenings, and springs seated in the sockets and bearing on the blades.

6. In combination with a series of cuttingdisks, a rocking barthereover, means for rocking the bar, a series of blade-holders appliedto the rear face of the bar each with a vertical opening having itssides diverging and inclined outward towardthe respective disks, aseries of scraper-blades, each with its upper end extending in anopening, fastening devices for the blades, and a series of springsmounted in the holdersand bearing on the blades.

7. In a disk harrow the combination with a disk of a rocking barthereover formed with a socket, a scraper-blade having its upper endextended in the socket, a fastening device for holding the same in thesocket, said blade and socket formed relatively to permit the blade tomove in the direction of the axis of the disk and also around its ownlongitudinal axis, and a spring bearing on the blade and tending to holdthe same against the disk.

8. In a disk harrow the combination with a series of disks of a rockingbar thereover, a series of blade-holders fixed to the bar each beingformed with a vertical opening to receive the blades, said openingsbeing considerably larger than the thickness ot the blades to permitthem to move therein, a series of blades extending in said opening andeach provided in its upper end with an enlarged ho1e,-fastening-pinssustained by the holders 5 and extending in the holes in the blades, andsprings also sustained by the holders and bearing on the respectiveblades; whereby the rocking bar serves as the sole support for theblades which have an independent universal movement subject to theaction of 10 the springs.

In testimony whereof I hereunto set my hand, this 14th day of November,1899, in the presence of two attesting witnesses.

' AUGUST LINDGREN.

WVitnesses:

O. H. LIPPINOOTT, O. H. 'GODEHN.

